SM21 AA12 Compact Audio Controller INSTALLATION AND OPERATION MANUAL REV 4.10 September 9, 2004 Northern Airborne Technology Ltd. 1925 Kirschner Road Kelowna BC, Canada. V1Y 4N7 Telephone (250) 763-2232 Facsimile (250) 762-3374 Copyright 2004 by Northern Airborne Technology CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
SM21 Rev.4.10 Compact Audio Controller Manual Periodically NAT will release manual amendments. In order to maintain the most accurate and up to date manual these amendments should be carried out immediately upon receipt and recorded on the following amendment record. AMENDMENT RECORD Amendment Amendment Number Date Section(s) Changed Date Entered Entered By Insert any Amendment Instruction sheets after this page. Sep 09, 2004 Page ii ENG-FORM: 820-0109.
SM21 Rev.4.10 Compact Audio Controller Manual Table of Contents Section Title 1 Description 1.1 1.2 1.3 1.4 1.4.1 1.4.2 1.4.3 1.5 Introduction Purpose of Equipment Features Specifications Electrical Specifications Physical Specifications Environmental Specifications Unit Nomenclature 2 Installation 2.1 2.2 2.2.1 2.3 2.3.1 2.3.2 2.3.3 2.3.4 2.3.5 2.3.6 2.3.7 2.4 2.5 2.
SM21 Rev. 4.10 AA12 Compact Audio Controller Manual Section 1 Description 1.1 Introduction This manual contains information on the AA12 Compact Audio Controller. All derivative products will be covered by manual supplements, which can be obtained from NAT as required. Information in this section consists of purpose of equipment, features and specifications. 1.
AA12 Compact Audio Controller Manual SM21 Rev. 4.10 The AA12 features NAT's ICS TIE LINE, allowing it to be connected to any other NAT audio product with the same feature, and a MUSIC input, with the music muted by TX, RX or ICS activity. Internal control is provided for radio receive level, artificial transmit sidetone level, music level, and ATC mute level. Intercom level and VOX squelch are adjustable from the front panel.
SM21 Rev. 4.10 1.4.2 AA12 Compact Audio Controller Manual Inputs: 6 Standard HI Z MICs (250 mVrms for full output) 1 Music (3 Vp-p, 600 Ω input Z) 7 Radio (2.5 Vrms, 1 kΩ input Z) 1 ICS Key (ground seeking) 1 ICS Tie Line (ICS expansion) 2 TX Keys (ground seeking) 1 Direct Audio Outputs: 6 HI Z Headsets (150–600 Ω) 4 Transmitter MIC/Key/Lo Physical Specifications 1.4.3 Height: 1.1” (28.5 mm) Length: 5.8” (146.1 mm) behind panel Width: 5.8” (146.1 mm) in front of panel 4.9” (124.
AA12 Compact Audio Controller Manual 1.5 SM21 Rev. 4.10 Unit Nomenclature The models covered by this manual are the base units from which all other models are derived. For details of other available models, please contact NAT.
SM21 Rev. 4.10 AA12 Compact Audio Controller Manual Section 2 Installation 2.1 Introduction Information in this section consists of: unpacking and inspection procedures, installation procedures, post-installation checks, and installation drawings. 2.2 Unpacking and Inspection Unpack the equipment carefully and locate the warranty card. Inspect the unit visually for damage due to shipping and report all such claims immediately to the carrier involved.
AA12 Compact Audio Controller Manual 2.3.2 SM21 Rev. 4.10 Cautions In all installations, use shielded cable exactly as shown and ground as indicated. Significant problems could result from not following these guidelines. Shield and route the microphone (MIC) and ICS tie lines used in the AA12 installation appropriately. Not doing this can result in poor performance of the aircraft audio system.
SM21 Rev. 4.10 2.3.5 AA12 Compact Audio Controller Manual Mechanical Mounting For the standard AA12 units, mounting is accomplished in a standard Dzus rack or rail assembly with a clearance opening of 5 inches, a full width dimension of 5.75 inches, and a total of 1.125 inches of rail height. Verify that adequate rear cable clearance is left when planning console installations. The AA12T variants are tray-mounted units.
AA12 Compact Audio Controller Manual 2.3.7 SM21 Rev. 4.10 Adjustments The unit is shipped from the factory with all internal adjustments set to the normal test levels. Once installed in the aircraft, it may be desirable to change some of these settings to best suit the local operating environment. The internal adjustments that can be varied are located along the left side of the unit and are as follows: ATC Adjusts the trigger point for music muting from an incoming radio source.
SM21 Rev. 4.10 AA12 Compact Audio Controller Manual D25PL-IKC Quantity Description NAT Part # 1 25 1* 1* 1 D-min 25 Pin Housing MS Crimp Pin Jack Screw Set Lock Clip Set 25 Pin Connector Hood 20-11-025 20-26-891 20-27-002 20-27-004 20-29-026 * Use as required. 2.6 Installation Drawings DRAWING REV. DESCRIPTION TYPE AA12\001\403-0 1.10 Compact Audio Controller Interconnect AA12\001\405-0 1.12 Compact Audio Controller Connector Map AA12\001\905-0 1.
Confidential and Proprietary to NAT
Confidential and Proprietary to NAT
SM21 Rev. 4.10 AA12 Compact Audio Controller Manual Section 3 Operation 3.1 Introduction Information in this section consists of the functional and operational procedures for the AA12 Compact Audio Controller, and is applicable to the AA12-001, the AA12-002 and the AA12T-002 unless otherwise noted. 3.2 General The AA12 is a compact audio controller that provides full boom microphone (MIC) support and high performance audio for up to six crew positions with VOX, LIVE and KEYED ICS capability.
AA12 Compact Audio Controller Manual 3.3.2 SM21 Rev. 4.10 Receive Audio – AA12-002/AA12T-002 RX Select Switches The AA12-002 is typically configured to select the receive (RX) audio from three transceivers. The RX select switches are two-position toggle switches. Transceiver audio can be selected by setting the applicable RX select switch to the up position, and deselected (turned off) by setting the applicable RX select switch to the down position.
SM21 Rev. 4.10 3.4 AA12 Compact Audio Controller Manual Intercom ICS Volume Control VOX Squelch Control The AA12 provides three modes of intercom operation, as selected by the position of the VOX Squelch control: LIVE VOX Squelch positioned fully counter-clockwise (ccw) VOX VOX Squelch positioned in the active range MAX (keyed) VOX Squelch positioned fully clockwise (cw) When the VOX Squelch control is adjusted to the fully ccw direction, the AA12 is in LIVE ICS mode.
AA12 Compact Audio Controller Manual 3.6 Pilot Isolate/Emergency Operation 3.6.1 Pilot Isolate SM21 Rev. 4.10 The Pilot Isolate switch is a red, two-position toggle switch. This switch can be set to NORM for normal use. However, the AA12 provides split bus operation, allowing the pilot to be removed from the intercom and entertainment channels.
